At an infamous prison in the Amazon, the most dangerous criminals on earth faced hard labor, a hostile environment, and death by guillotine; today, it's deserted, and new discoveries reveal why this compound was built and why it was abandoned.

An abandoned town in the Nevada desert are the ruins of an American Atlantis, destroyed by catastrophic floods when the Hoover Dam was built; today, experts investigate the secrets of this ghost town as water levels recede and the city reemerges.

A mysterious castle was once a fairytale estate, but today, the building is said to be haunted, and experts investigate the secrets of this eerie fortress and the ghostly stories inside.

Sparks fly as a group of expert bot builders fight head-to-head to become BattleBots champions.

A supersized Fight Night rolls on as robots collide in five deadly smackdowns, concluding in a world class fight between two heavyweights.

Expert robot builders continue their quest to become BattleBots champions, and two legends go head-to-head in an epic showdown.

As the battles continue, a legendary bot takes on the reigning champion in an epic, supersized face-off.

A supersized Fight Night pits two fan favorites against each other in a ferocious heavyweight bout.

Two world-class robots face-off as elite robots compete for the 2018 BattleBots championship.

A first-time fighter looks to unseat a former BattleBots champ in a match to the death.

After waiting years for a rematch, two legendary bots compete for the chance to redeem themselves.

Two undefeated bots collide in an epic battle as world-class robots fight for the 2018 BattleBots championship.

Two unbeaten bots battle to protect their winning streak as the competition gets fierce.

Eight teams get their chance of redemption as they compete for a guaranteed spot in the 2019 BattleBots World Championship.

A world-class bot looks to upset the reigning champion as the battles rage on in the BattleBots 2018 competition.

After two long years, two world-class bots face-off in a long-awaited rematch.